Fibre Softening
A thermal or chemical treatment applied to a twisted fiber strand softens the binding pectin so that individual fibers can be drawn out during drafting. In wet spinning of linen, roving twist solubilization occurs when the wound bobbins are submerged in hot water before entering the spinning frame. This process dissolves the natural hemicellulose and wax, loosening the twist without breaking the strand.
Spinners monitor the water temperature and soaking time to ensure complete softening of the roving. If the temperature is too low, the twist remains rigid, causing fiber breakage and machine stoppages during drawing.
Drafting Preparation
A thoroughly softened roving allows the drafting rollers to slide the flax fibers past each other with minimal resistance. Through roving twist solubilization, the stiff, highly twisted roving is transformed into a pliable strand ready for high-speed drafting. The wet treatment is documented on the spinning floor card, which records the water chemistry and immersion duration for each lot of linen.
Yarn Uniformity
A uniform drafting action prevents thin spots and slubs from forming in the final spun thread. When the roving twist is properly solubilized, the resulting linen yarn is smoother and possesses a higher tensile strength. This consistency is verified through laboratory testing before the yarn is sent to the weave room.
